Light circuit for imaging device

A medical imaging device having a bore 104 for receiving a patient during a medical imaging process and a ventilation channel 216 having an opening within the upper circumference of the bore for supplying cool air into the bore. At least one lighting circuit 210. Air supplied from the ventilation channel passes over the lighting circuit and may cool the circuit and prevent overheating effects within the lighting circuit such as that are caused by fields which may be generated during the medical imaging process. The lighting circuit may include one or more LEDs and may be positioned within the ventilation channel and is configured to illuminate the entire length of the bore. The lighting circuit may also comprise filters (508, Fig. 5), wherein a resonance frequency of the medical imaging device is within the stopband of the filters.